Method of shaping a bell end on a pipe of thermoplastic...

Details Method of shaping a bell end on a pipe of thermoplastic... Method of shaping a bell end on a pipe of thermoplastic...

B - Operations, Transporting

29

C

18/938

B29C 57/02 (2006.01)

Patent

CA 1050221

ABSTRACT OF THE DISCLOSURE There is disclosed a method of and a mandril assembly for shaping a bell end on a pipe of thermoplastic material, in which an elastic shaping ring is used which is expanded radially in its operative position during the shaping of the bell end and which can be removed from the bell end formed by radial contraction. To this end, the mandril assembly comprises a shaping mandril which is composed of a plurality of portions which are profiled and slidable with respect to each other such that the shaping ring is locked in the radial and the axial direction in the operative position, and can retreat into a chamber which is formed between the slidable parts after the bell end has been formed.

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